The present analysis describes an analytically simple and systematic approximation procedure for modelling the free diffusive spreading of initially super-Gaussian profiles. The approach is based on a self-similar ansatz for the evolution of the diffusion profile, and the parameter functions involved in the modelling are determined by suitable…

Some simple modeling with Riemann sums can be used to develop Beer's Law, which describes the relationship between the absorbance of light and the concentration of the solution which the light is penetrating. A further application of the usefulness of Beer's Law in creating calibration curves is also presented. (Contains 3 figures.)

The uniform precession of a simple form of gyroscope is analysed via a direct application of Newton's laws, using only concepts generally taught to physics and engineering students in the first two years of an undergraduate programme, with an emphasis on understanding the forces and torques acting on the system. This type of approach, in the…

The ice cream laboratory experiment is designed to illustrate and promote discussion of several engineering and science topics including material and energy balances, heat transfer, freezing, mass transfer, mixing, viscosity, and freezing point depression in a sophomore level engineering class. A pre-lab assignment requires the students to develop…

This paper is an general article about the influence of constructivism on nature of science. Constructivism has influenced research on the teaching and learning of nature of science, as well as actual teaching of the nature of science ideas. In the area of research, a constructivist learning theory perspective has influenced researchers to shift…

The past two decades have seen an increased need for better consumer reporting in education. This has resulted in part from a variety of education initiatives sponsored by the US Department of Education (ED) and others. The initiatives have increased the number of school improvement options available to educators and encouraged--or sometimes…

This article explores the meaning of the nature of science education to enhance scientific literacy. It argues that the teaching approach for science education should be regarded as "education through science", rather than "science through education". A model of the nature of science education is proposed, having its foundations based on activity…

Problem statement: In the context of science education reform in Thailand, we need to prepare science teachers who can face science and social issues controversial; teachers can response the question socioscientific issues and let their students to meet the goal of science education. This study investigated the conception leading preservice…

Constructing scientific explanations and participating in argumentative discourse are seen as essential practices of scientific inquiry (e.g., R. Driver, P. Newton, & J. Osborne, 2000). In this paper, we identify three goals of engaging in these related scientific practices: (1) sensemaking, (2) articulating, and (3) persuading. We propose using…

There are a number of ways of exciting standing waves in ropes and springs using non-commercial vibrators such as loudspeakers, jigsaws, motors, or a simple tuning fork, including the rhythmical shaking of a handheld Slinky. We have come up with a very simple and cheap way of exciting stationary waves in a string, which anyone, particularly…

Science museums and popular physics shows often exhibit a blower in whose air stream a ball is held hovering in equilibrium some distance above the jet's orifice. The weight of the ball, "mg," is balanced by the drag force of the turbulent air stream, often written as ?Cv[superscript 2]A, where "?" and "v" are the…

Presents an approach to the understanding of gas laws using such common phenomena as insect fogging, sea breezes, and hot air balloons. (GS)

RESEARCH WAS CONDUCTED TO ESTABLISH THE DEGREE OF SCIENTIFIC KNOWLEDGE THAT IS REQUIRED TO UNDERSTAND SCIENCE ARTICLES IN CURRENT NEWSPAPERS AND MAGAZINES. ALL ARTICLES ABOUT SCIENCE OR REQUIRING SCIENCE FOR INTERPRETATION WERE COLLECTED FOR A 6-MONTH PERIOD FROM NINE MAGAZINES AND 22 NEWSPAPERS. TERMS WERE CATEGORIZED AND RELATED TO THE…

This document presents a discussion and conceptual derivation of Einstein's postulates of special relativity. The perceptron approach appears to be a fundamentally new manner of regarding physical phenomena and it is hoped that physicists will interest themselves in the concept. (Author)

The focus of this paper is on Michael Polanyi, a contemporary scientist and philosopher, and on some general features which are embedded in rhetorical theory's traditional bases and contemporary manifestations and which are seen from Polanyi's vantage point. The author discusses the basic features which undergird rhetorical theories and are…